create spinner options from json data / array

Question

1. My question: How do I take my JSON data and parse it into an array that I can use in my spinner.

Below is my json data:

[["Mike Test 1"],["Mike Test 2"],["hello world"],["TEST MIKE 4"],["TEST MIKE 6"],["aliens,crazy stuff"],["Alien"],["american flags,flags"]]

My script calls a function that gets the data. I know that is working because I have toasted the return value. It should then loop through and assign the values to a new array that is used in the spinner.

Below is my java:

  Spinner areaspinner;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


    JSONArray jsonArray;

    try {
    //SETTINGS AND METHOD THAT GETS THE DATA
        String spinnerContentType = "styles";
        String spinnerURL = "getStyles.php";
        String spinner_data =  DataCall.getJSON(spinnerURL,spinnerContentType); 

     //NEW JSONArray OBJECT
        jsonArray = new JSONArray(spinner_data);

        final String[] array_spinner = new String[jsonArray.length()]; 

        int show_total = jsonArray.length();
        //CHECK HOW MANY ITEMS ARE RETURNED
        Toast.makeText(flash_tattoo.this, show_total + "test", Toast.LENGTH_LONG).show();

        for (int i=0; i<jsonArray.length(); i++)
        {
            //LOOP AND ASSIGN TO ARRAY
            String styleValue = jsonArray.getJSONArray(0).getString(i); 
            array_spinner[i] = styleValue;

        }
        ArrayAdapter<String> adapter = 
            new ArrayAdapter<String> (this, 
                    android.R.layout.simple_spinner_item,array_spinner);

        adapter.setDropDownViewResource(R.layout.spinner_layout);
        areaspinner.setAdapter(adapter);

    }catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

This is my spinner layout:

<?xml version="1.0" encoding="utf-8"?>

<TextView 
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@android:id/text1" 
  style="?android:attr/spinnerDropDownItemStyle" 
  android:singleLine="true" 
  android:layout_width="fill_parent" 
  android:layout_height="?android:attr/listPreferredItemHeight"
  android:textColor="#e70909"
/>

Do you see the options when replacing adapter.setDropDown.. with this in your code, adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); — rochdev
– rochdev, Commented Aug 18, 2011 at 4:54
@rochdev Changing the setdropdownviewresource did not help. Thanks though. — Denoteone
– Denoteone, Commented Aug 18, 2011 at 5:18
I see the word "areaspinner" only once in your code. Is that the correct name? Where are you instantiating that? — Thunder Rabbit
– Thunder Rabbit, Commented Aug 18, 2011 at 5:55
@Thunder Rabbit I added the areaspinner at the top of the code. — Denoteone
– Denoteone, Commented Aug 18, 2011 at 6:00

rochdev · Accepted Answer · 2011-08-18 06:32:55Z

2

To me it looks like areaspinner is null.

To add a spinner you have something like this in your main.xml.

<Spinner android:id="@+id/mySpinner"
        android:layout_width="fill_parent" android:layout_height="wrap_content"
        android:prompt="@string/mySpinnerText" />

Then in onCreate()

Spinner sp = (Spinner) findViewById(R.id.mySpinner);
        ArrayAdapter<String> adapter = 
                new ArrayAdapter<String> (this, android.R.layout.simple_spinner_item, array_spinner);       
        adapter.setDropDownViewResource(R.layout.spinner_layout);
        sp.setAdapter(adapter);

answered Aug 18, 2011 at 6:32

rochdev

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1 Comment

Denoteone Over a year ago

Your post and one of the comments help me figure out what the issue was. I was creating my spinner but I was not adding the spinner to a view since it was in my layout it was still coming up and that is what confused me. Thanks and +1

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